From e857889721b4d54ae68db9c9240c986335016ec8 Mon Sep 17 00:00:00 2001
From: "Aode (lion)" <asonix@asonix.dog>
Date: Mon, 13 Dec 2021 20:51:41 -0600
Subject: [PATCH] Initial commit

---
 .gitignore  |    2 +
 Cargo.lock  | 1199 +++++++++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml  |   16 +
 src/main.rs |  309 +++++++++++++
 4 files changed, 1526 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 src/main.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..eedb83c
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
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diff --git a/Cargo.lock b/Cargo.lock
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index 0000000..b889dd2
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+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0120db82e8a1e0b9fb3345a539c478767c0048d842860994d96113d5b667bd69"
+dependencies = [
+ "winapi",
+]
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..0d3302b
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,16 @@
+[package]
+name = "release-checker"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+color-eyre = "0.5.11"
+reqwest = { version = "0.11", default-features = false, features = ["rustls-tls", "json"] }
+serde = { version = "1", features = ["derive"] }
+tracing = "0.1"
+tracing-error = { version = "0.1.2", features = ["traced-error"] }
+tracing-subscriber = { version = "0.2", features = ["env-filter"] }
+tokio = { version = "1", features = ["full"] }
+toml = "0.5.8"
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..f86a57b
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,309 @@
+use std::fmt::Display;
+use std::num::ParseIntError;
+use std::path::PathBuf;
+use std::str::FromStr;
+
+use reqwest::header::{HeaderMap, HeaderValue};
+use reqwest::{Client, StatusCode};
+use tracing::subscriber::set_global_default;
+use tracing_error::ErrorLayer;
+use tracing_subscriber::layer::SubscriberExt;
+use tracing_subscriber::{EnvFilter, Registry};
+
+#[derive(Clone, Debug, serde::Deserialize)]
+#[serde(rename_all = "kebab-case")]
+struct CheckConfig {
+    project: ProjectConfig,
+    gitea: GiteaConfig,
+}
+
+#[derive(Clone, Debug, serde::Deserialize)]
+#[serde(rename_all = "kebab-case")]
+#[serde(tag = "kind")]
+enum ProjectConfig {
+    #[serde(rename = "git")]
+    Git {
+        repository: String,
+
+        #[serde(flatten)]
+        language: LanguageConfig,
+    },
+}
+
+#[derive(Clone, Debug, serde::Deserialize)]
+#[serde(rename_all = "kebab-case")]
+#[serde(tag = "language")]
+enum LanguageConfig {
+    #[serde(rename = "rust")]
+    Rust { config: PathBuf },
+}
+
+#[derive(Clone, Debug, serde::Deserialize)]
+#[serde(rename_all = "kebab-case")]
+struct GiteaConfig {
+    domain: String,
+    owner: String,
+    repo: String,
+}
+
+#[derive(Clone, Debug, serde::Deserialize)]
+struct CargoToml {
+    package: CargoPackage,
+}
+
+#[derive(Clone, Debug, serde::Deserialize)]
+struct CargoPackage {
+    version: String,
+}
+
+#[derive(Clone, Debug, Default)]
+struct Revision {
+    version: String,
+    revision: usize,
+}
+
+impl Revision {
+    fn next(self, version_string: String) -> Self {
+        if self.version == version_string {
+            Revision {
+                revision: self.revision + 1,
+                ..self
+            }
+        } else {
+            Revision {
+                version: version_string,
+                revision: 0,
+            }
+        }
+    }
+}
+
+impl FromStr for Revision {
+    type Err = RevisionError;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        if let Some((version, revision)) = s.rsplit_once('-') {
+            let revision = revision
+                .trim_start_matches('r')
+                .parse()
+                .map_err(RevisionError::Revision)?;
+
+            Ok(Revision {
+                version: version.to_owned(),
+                revision,
+            })
+        } else {
+            Err(RevisionError::Format)
+        }
+    }
+}
+
+impl Display for Revision {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}-r{}", self.version, self.revision)
+    }
+}
+
+#[derive(Clone, Debug, serde::Serialize)]
+struct GiteaTag {
+    tag_name: String,
+}
+
+#[derive(Clone, Debug, serde::Deserialize)]
+struct GiteaTagResponse {
+    name: String,
+}
+
+struct RemoveOnDrop<'a>(&'a str);
+
+impl<'a> Drop for RemoveOnDrop<'a> {
+    fn drop(&mut self) {
+        let _ = std::fs::remove_dir_all(self.0);
+    }
+}
+
+#[derive(Debug)]
+enum GitError {
+    Clone,
+}
+impl Display for GitError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::Clone => write!(f, "Failed to clone repository"),
+        }
+    }
+}
+impl std::error::Error for GitError {}
+
+#[derive(Debug)]
+enum TagError {
+    Status(StatusCode),
+}
+impl Display for TagError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::Status(code) => {
+                write!(f, "Failed to create tag, invalid response status: {}", code)
+            }
+        }
+    }
+}
+impl std::error::Error for TagError {}
+
+#[derive(Debug)]
+enum RevisionError {
+    Format,
+    Revision(ParseIntError),
+}
+impl Display for RevisionError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::Format => write!(f, "Invalid revision format"),
+            Self::Revision(e) => write!(f, "Failed to parse revision number, {}", e),
+        }
+    }
+}
+impl std::error::Error for RevisionError {}
+
+#[tracing::instrument]
+async fn check_git_project(
+    repository: String,
+    language: LanguageConfig,
+) -> color_eyre::eyre::Result<String> {
+    static CHECK_REPO: &str = "checked-project";
+    let _remover = RemoveOnDrop(CHECK_REPO);
+
+    let output = tokio::process::Command::new("git")
+        .args(["clone", &repository, CHECK_REPO])
+        .output()
+        .await?;
+
+    if !output.status.success() {
+        return Err(GitError::Clone.into());
+    }
+
+    match language {
+        LanguageConfig::Rust { config } => {
+            let config_path = PathBuf::from(CHECK_REPO).join(config);
+
+            let config_string = tokio::fs::read_to_string(&config_path).await?;
+
+            let rust_config: CargoToml = toml::from_str(&config_string)?;
+
+            Ok(format!("v{}", rust_config.package.version))
+        }
+    }
+}
+
+#[tracing::instrument(skip_all)]
+fn build_client(gitea_token: &str) -> color_eyre::eyre::Result<Client> {
+    let mut headers = HeaderMap::new();
+    headers.insert(
+        "Authorization",
+        HeaderValue::from_str(&format!("token {}", gitea_token))?,
+    );
+
+    let client = reqwest::Client::builder()
+        .default_headers(headers)
+        .user_agent("release-checker (+https://git.asonix.dog/asonix/release-checker)")
+        .build()?;
+
+    Ok(client)
+}
+
+#[tracing::instrument(skip(client))]
+async fn get_previous_revision(
+    client: &Client,
+    config: &GiteaConfig,
+) -> color_eyre::eyre::Result<Revision> {
+    let tags_url = format!(
+        "https://{}/api/v1/repos/{}/{}/tags?page=1&limit=1",
+        config.domain, config.owner, config.repo
+    );
+    let tags_response = client.get(tags_url).send().await?;
+
+    let mut tags: Vec<GiteaTagResponse> = tags_response.json().await?;
+
+    let revision = if let Some(tag) = tags.pop() {
+        tag.name.parse()?
+    } else {
+        Revision::default()
+    };
+
+    Ok(revision)
+}
+
+#[tracing::instrument(skip(client))]
+async fn create_tag(
+    client: &Client,
+    config: &GiteaConfig,
+    revision: &Revision,
+) -> color_eyre::eyre::Result<()> {
+    let tag_url = format!(
+        "https://{}/api/v1/repos/{}/{}/tags",
+        config.domain, config.owner, config.repo
+    );
+
+    let response = client
+        .post(tag_url)
+        .json(&GiteaTag {
+            tag_name: revision.to_string(),
+        })
+        .send()
+        .await?;
+
+    if !response.status().is_success() {
+        return Err(TagError::Status(response.status()).into());
+    }
+
+    Ok(())
+}
+
+fn init_tracing() -> color_eyre::eyre::Result<()> {
+    let env_filter = EnvFilter::try_from_default_env().unwrap_or_else(|_| EnvFilter::new("info"));
+    let format_layer = tracing_subscriber::fmt::layer().pretty();
+
+    let subscriber = Registry::default()
+        .with(env_filter)
+        .with(format_layer)
+        .with(ErrorLayer::default());
+
+    set_global_default(subscriber)?;
+    Ok(())
+}
+
+async fn check_project(project: ProjectConfig) -> color_eyre::eyre::Result<String> {
+    match project {
+        ProjectConfig::Git {
+            repository,
+            language,
+        } => check_git_project(repository, language).await,
+    }
+}
+
+#[tracing::instrument]
+async fn run() -> color_eyre::eyre::Result<()> {
+    let config = tokio::fs::read_to_string("./Check.toml").await?;
+    let config: CheckConfig = toml::from_str(&config)?;
+
+    let client = build_client(&std::env::var("GITEA_TOKEN")?)?;
+
+    let previous_revision = get_previous_revision(&client, &config.gitea).await?;
+
+    let version_string = check_project(config.project).await?;
+
+    let revision = previous_revision.next(version_string);
+    tracing::info!("New revision: {}", revision);
+
+    create_tag(&client, &config.gitea, &revision).await?;
+
+    Ok(())
+}
+
+#[tokio::main]
+async fn main() -> color_eyre::eyre::Result<()> {
+    init_tracing()?;
+    color_eyre::install()?;
+
+    run().await
+}